
<template>
  <div ref="canvas" class="w-full h-96"></div>
</template>

<script setup lang="ts">
import * as echarts from 'echarts';
import { onMounted, onUnmounted, ref } from 'vue';

let canvas = ref(null);
const line = ref<any>(null); // 获取echarts
let option = {
  title: {
    text: '统计数据'
  },
  tooltip: {
    trigger: 'axis'
  },
  legend: {
    data: ['Email', 'Union Ads', 'Video Ads', 'Direct', 'Search Engine']
  },
  grid: {
    left: '3%',
    right: '4%',
    bottom: '3%',
    containLabel: true
  },
  toolbox: {
    feature: {
      saveAsImage: {}
    }
  },
  xAxis: {
    type: 'category',
    boundaryGap: false,
    data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
  },
  yAxis: {
    type: 'value'
  },
  series: [
    {
      name: 'Email',
      type: 'line',
      stack: 'Total',
      data: [120, 132, 101, 134, 90, 230, 210]
    },
    {
      name: 'Union Ads',
      type: 'line',
      stack: 'Total',
      data: [220, 182, 191, 234, 290, 330, 310]
    },
    {
      name: 'Video Ads',
      type: 'line',
      stack: 'Total',
      data: [150, 232, 201, 154, 190, 330, 410]
    },
    {
      name: 'Direct',
      type: 'line',
      stack: 'Total',
      data: [320, 332, 301, 334, 390, 330, 320]
    },
    {
      name: 'Search Engine',
      type: 'line',
      stack: 'Total',
      data: [820, 932, 901, 934, 1290, 1330, 1320]
    }
  ]
};
onMounted(() => {
  init();
});

const init = () => {
  line.value =  echarts.init(canvas.value);
  line.value.setOption(option);
}

onMounted(() => {
  window.addEventListener("resize", () => {
    line.value.resize(); // 窗口发生改变就更新echarts
  });
  init();
});

onUnmounted(() => {
  // 卸载echarts实例
  line.value.dispose();
  window.removeEventListener("resize", line.value);
});
</script>
  
<style scoped></style>
  